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环境安全事件近来接二连三发生。年初以来全国东部大范围地区持续出现雾霾天气,3月中旬上海和嘉兴发生较大规模的死猪事件,3月底以来H7N9禽流感肆虐扩散。一桩桩事件波及范围和造成影响逐步扩大,未来态势及更深远影响仍难以预测,令人忧心忡忡。生态系统是牵一发而动全身的有机整体。我们生活在以城市和农村为主的生态系统中。这个系统中丰
Environmental safety incidents have occurred one after another recently. Fog and haze continued to occur in large areas of the eastern part of the country since the beginning of the year. Larger dead pigs occurred in Shanghai and Jiaxing in mid-March. The bird flu has been rampant since the end of March. It is worrisome that the extent and impact of the pile-up incident will gradually widen. The future situation and the far-reaching impact are still unpredictable. Ecosystem is the organic whole body that leads the whole body. We live in urban and rural ecosystems. Feng system in this